Assembly jigs for bifolding doors



Sept. 12, 1967 N. F. GUSTAFSON' ASSEMBLY JIGS FOR BIFOLDING DOORS 6 Sheets-Sheet 1 Filed Aug. 25, 1965 I I N VEN TOR.

NORMAN F. GUSTAFSO N a/m gfy u/ ATTO R N EYS Sept. 12, 1967 F] G TAFSQN 3,340,913:

ASSEMBLY JIGS FdR"BIFOLDiNG DOORS Filed Aug. 25, 1965 6 Sheets-Sheet D 7 I H INVENTOR. L -1|'*""' ml NORMAN F. GUSTAFSON NW W i BY ATTORNEYS l 1967 N. F. GUSTAFSON 7 3,340,913

ASSEMBLY JIGS'FOR BIFOLDING DOORS Filed Aug. 25, 1965 6 Sheets-Sheet 3 INVENTOR. NORMAN F. GUSTAFSON ATTORNEYS Sept. 12, 1967 N. F GUSTAFSON 3,340,913

ASSEMBLY JIGS FOR IBIFOLDING DOORS;

s She ets-Sheet 4 Filed Aug. 25, 1965 INVENTOR.

NORMAN F, GUSTAFSON ATTORNEYS Sept- 1967 N. F. GUSTAFSON 3,340,913

ASSEMBLY JIGS FOR BIFOLDING DOORS Filed Aug. 25, 1965 6 SheeCs-Sheet s flmummmu 2' I INVENTOR. NORMAN F. GUSTAFSON ATTORNEYS p 1967 N. F. GUSTAFS-ON 3,340,913

ASSEMBLY JIGS FOR BIFOLDING DOORS Filed Aug. 25, 1965 6 Sheets-Sheet 6 I N VENTOR. NORMAN F. GUSTAFSON ATTORNEYS United States Patent 3,340,913 ASSEMBLY JIGS FOR BIFOLDING DOORS Norman F. Gustafson, West Hartford, Conn., assignor to The Stanley Works, New Britain, Conn., a corporation of Connecticut Filed Aug. 25, 1965, Ser. No. 482,578 16 Claims. (Cl. 144-288) This invention generally relates to,devices for facilitating the assembly of door panels and more particularly concerns jigs for attaching hinges to a pair of door panels and adapting the same for use in a bifolding door installation.

A primary object of the present invention is to provide an improved jig assembly to facilitate the application of door hardware to a pair of door panels and which is readily adapted for use with different sets of panels of varying dimensions.

Another object of the present invention is to provide an improved jig assembly particularly suited to align and secure a pair of door panels in proper positional relation for quick and easy hinge attachment to join the panels to one another. Included in this object is the aim of providing a jig assembly of the type referred to which includes an improved device, adjustable to panels of varying height, for simultaneously locating a plurality of hinges on the meeting panel edges in proper position for joining the panels.

Still another object of the present invention is to provide an improved jig assembly which is easy to set up and use to provide precision application of door hardware to door panels, even by an unskilled operator, and which is nevertheless stable to give reliable service over a long period of time.

Other obje-cts will be in part obvious and in part pointed out more in detail hereinafter.

The invention accordingly consists in the features of construction, combination of elements and arrangement of parts which will be exemplified in the construction hereafter set forth and the scope of the application which will be indicated in the appended claims.

In the drawings:

FIG. 1 is an isometric view of a jig .assembly incorporating the present invention;

FIG. 2 is an enlarged view, partly broken away and partly in section, taken generally along line 2-2 of FIG. 1;

FIG. 3 is a left end view of FIG. 2; I

FIG. 4 is a view taken along line 4-4 of FIG. 2;

FIG. 5 is a view taken along line 5-5 of FIG. 2;

FIG. 6 is an enlarged cross section view of a template incorporated in the present invention, taken along line 6-6 of FIG. 1;

FIG. 7 is an enlarged bottom view of the template taken along line 7-7 of FIG. 6;

FIG. 8 is a side view of the template, on a reduced scale, taken generally along line 8-8 of FIG. 6;

FIG. 9 is an isometric view, partly broken away, of a jig assembly incorporating another embodiment of the present invention;

FIG. 10 is an enlarged view, partly broken away and partly in section, taken generally .along line 10-10 of FIG. 9;

FIG. 11 is a top view, partly broken away, illustrating a portable jig incorporated in the present invention; and

FIG. 12 is a side view, partly broken away, of the portable jig.

Briefly stated, the invention is embodied in a jig assembly, described more specifically below, having a frame adapted to support a pair of door panels in properly aligned relation so that their adjacent side edges may be joined by hinges located by associated hinge supports or templates of the jig assembly. The jig assembly additionally provides for quick and easy drilling of sockets in the top and bottom edges of the panels if required, for example, to receive pivot and guide members adapting the panels for use in a bifolding door installation. In essence, two different embodiments of the present invention are illustrated in the drawings. In the embodiment shown in FIGS. 1 through 8, hinge attachment is made easier by templates provided in a portable device, and the drilling of sockets is efiiciently accomplished with the aid of guides incorporated in the frame. In the second embodiment disclosed in FIGS. 9 through 12, hinge attachment is facilitated by templates secured to the frame, and the drilling of sockets is guided by a portable device for properly locating the sockets in the top and bottom edges of the panels.

Referring first to that form of the present invention shown in FIGS. 1 through 8, the illustrated wooden A frame 10 is of conventional construction and is provided with a panel support assembly for receiving and holding the door panels on one side of the frame. The panel support assembly includes three rectangular supports 12 projecting outwardly in alignment with one another from the one side of the A frame. Each support 12 is fixed in right angle relation to one of a pair of legs 14 of the frame, there being three interconnected, downwardly diverging pairs of legs 14 shown in the drawings.

As best seen in FIGS. 2 through 5, a jig plate 16 is secured to and extends above the outer projecting face of the support 12 at the left-hand end of the A frame as viewed in the drawings. Adjacent the ri-ght-hand end of the A frame, a second jig plate 18, in aligned mirror image relation to jig plate 16, is suitably secured to a pair of elongated adjusting rods 20 horizontally extending through the projecting portions of the two remaining supports 12 each of which have a disengageable lower block portion 22 for releasably fixing the rods 20, and therefore the jig plate 18, in a desired adjusted position. The jig plate 18 is preferably screw mounted to the outer face of an apertured base plate 24, and the outer ends of the adjusting rods 20 are pinned to plate 24 which has its upper edge aligned with the upper edges of the supports 12. The jig plates 16, 18 are each shown as having a pair of vertically spaced pins 26 offset an equal predetermined distance from the legs 14 of the A frame.

The above described members of the panel support assembly are desirably formed of a strong, lightweight material capable of resisting repeated rugged wear, such as aluminum, to firmly support the panels on the frame.

It will now be apparent that a pair of door panels 28 and 30 may be conveniently laid flat on the A frame in side-by-side relation with their longitudinal axes horizontally disposed as illustrated in FIG. 1. The upper panel 28 rests upon the lower panel 30. The lower panel 30 in turn is held by the supports 12 and the base plate 24 of the panel support assembly, the lower panel 30 being neatly nested between the pins 26 of the jig plates and the legs 14 of the A frame.

The panel support assembly can be readily adjusted to accommodate variations in the height of different sets of panels merely by releasing the block portions 22 and laterally adjusting the movable jig plate 18 whereby the Patented Sept. 12, 1961 top and bottom edges of the lower panel 30 are snugly retained by the jig plates 16 and 18 upon securing the block portions 22.

To hinge the meeting side edges of the door panels 28 and 30, a portable jig tool 32 is provided as best seen in FIGS. 6 through 8. The portable jig tool 32 generally comprises an elongated connecting rod 34 having a plurality of generally rectilinear templates 36 mounted thereon and corresponding in number to the desired number of hinges to be applied to the door panels. The templates 36 each include a recess 38 formed in the bottom of the template for receiving a hinge 39 with its pivotal axis offset a preselected distance in parallel relation to the rod 34. Laterally extending clamps 40 releasably secure the templates 36 to the rod 34 for adjustment longitudinally thereof to provide the desired spacing between the hinges. Accurately located openings, such as at 41, are formed in the templates to appropriately correspond with preformed screw holes 42 in the hinge leaves.

Upon being placed within the recess 38, the hinges are magnetically retained by a pair of magnets 43 suitably fixed inside each template so that the magnets 43 respectively engage a portion of each hinge leaf whereby the hinges are releasably secured in alignment with one another to facilitate their attachment to the panels. Proper spacing between the panels is established by a circular tab 44 secured to each template 36 adjacent its recess. When the jig 32 is applied to the panels, a portion of the tab 44 extends downwardly between the panels in alignment with the pivotal axis of the hinge to maintain a preselected spacing between the panels.

To locate the end templates, positioned adjacent opposite ends of the rod 34, in proper relation to the top and bottom edges of the panels and, at the same time, to automatically align the top and bottom panel edges, the jig 32 is provided with a pair of locating brackets respectively secured on one of the end templates. More specifically, each locating bracket includes an L-shaped arm 46 attached to and extending from an end template parallel to the connecting rod 34. A transverse strap 48 is fixed to a depending end of the arm 46 which is thus adapted to lap the edges of the panels 28, 30 whereby both the top and bottom panel edges are respectively positioned in coplanar alignment to minimize manual manipulation of the panels.

It will now be apparent that upon adjusting the template clamps 40 for a particular panel height, the jig tool 32 may be manually placed in position on the panels 28, 30 with the hinges 39, magnetically retained by the templates 36, properly positioned longitudinally of the door panels. The transverse straps 48 embrace the adjacent edge portions at the top and bottom of the panels to properly align them as well as to automatically position the end templates 36 for hinge attachment. Fasteners such as screws are then simply dropped within the openings 41, which are aligned with the screw holes 42 of the hinge leaves, and screwed down to secure the hinges to the door panels. The jig tool 32 is then removed, for example, to a shelf 50 on the A frame below the panel support assembly and the upper panel 28 is flopped over the lower panel 30 with the panels preferably being spaced apart by the pins 26 to position the panels (FIGS. 2 through for drilling of the sockets in their top and bottom edges.

The jig plates 16 and 18 on the left and right hand ends of the A frame are each shown as havin a pair of apertures 51 respectively located in a predetermined position on opposite sides of a plane containing the pins 26, and a wear bushing 52 is illustrated as being secured in each aperture 51. The top and bottom edges of one panel thus may be accurately drilled to provide properly located bores or sockets for receiving pivot pins (not shown) for its subsequent installation in a doorway and the top edge of the other panel may be drilled to receive a guide member (not shown) assuring proper tracking movement in a bifolding door installation. In the specific illustrated em- 'bodiment of the invention, panel 39 is the jamb panel which is to be provided with pivot pins and panel 28 is the lead panel which is to be provided with a guide member. Since jig plates 16 and 18 are in mirror-image relation, the panels may be conveniently drilled regardless of whether their top edges are positioned on the left or right hands ends of the A frame.

Referring now to that embodiment of the invention illustrated in FIGS. 9 through 12, a pair of door panels 54 and 56 are illustrated in phantom in FIG. 9 as being set up on edge in face-to-face relation on a pair of laterally spaced brackets 58 projecting horizontally outwardly from one side of a table frame jig assembly generally designated by the numeral 60. The brackets 58 are preferably L- shaped with attached horizontal and vertical arms, the vertical arms being secured to vertical plates 62 fixed on the outer face of a pair of upright legs 64 and 66 on the one side of the table frame.

A pair of blocks 68 and 70 are positioned on opposite ends of each horizontal arm of the brackets 58 equidistant from a spacer 72 fixed at the center of the horizontal arm. The blocks 68 and 70 are desirably adjustable for panels of varying thickness such as the conventional dimensions of 1 /8 and 1 /8 inch door thickness. The panels 54, 56 thus are conveniently supported on the brackets 58 and are spaced apart by their center spacers 72 at a desired distance for facile attachment of hinges to the upstanding side edges of the panels 54, 56.

So that the brackets 58 both may be vertically adjusted for panels of varying width, the plates 62 secured to the table legs 64, 66 are provided with a plurality of accurately located apertures 78 vertically spaced for receiving lugs 76 projecting from the vertical arms of the L-shaped brackets 58 thereby to locate the latter at a number of preselected operational levels such that even an unskilled operator can expeditiously adjust the height of the brackets at a desired height in accordance with the level of the table top and the width of the panels. It will be understood that the vertical plates 62 are offset from the legs 64, 66 by any suitable means to provide proper spacing for the ends of the lugs 76 which protrude through the apertures 78 as best seen in FIG. 10, to securely attach the L-shaped bracket 58 to the vertical plates 62.

To align the top and bottom edges of the door panels 54, 56, stop members 80 and 82 are provided respectively at the left and right hand ends of the table frame as viewed in FIG. 9. The left-hand stop 80 is similar in construction to the L-shaped brackets 58 and is fixed relative to the leg 62 of the table frame with one of its arms projecting outwardly from the side of the table frame in a vertical plane for aligning the edges of the panels. To compensate for variations in the height of different sets of door panels, the right-hand stop 82 is adjustable longitudinally of the side of the table frame by means of an attached elongated rod 86 secured to the table frame by any suitable means such as the releasable block clamps 88 attached to the side of the table frame.

With the door panels 54, 56 supported at a desired operational level upon the bracket 58 with the top and bottom edges of the panels respectively aligned and secured against movement by the stops 80, 82, the upstanding side edges of the panels are positioned for quick and easy hinge attachment which is facilitated by a plurality of templates incorporated in the jig assembly 60. Three hinge receiving templates 90 are shown in the illustrated embodiment wherein each template 90 is mounted for pivotal movement relative to the top of the table frame by means of an attached arm 92, the arms 92 being secured by a suitable clamp 93 to an axle or rod 94 anchored to the top of the table frame parallel with the side edges of the panels and providing a common pivotal axis for the templates. So that the templates 90 can be positioned with efiiciency and ease between an operating position, wherein the templates overlie the side edges of the panels, and a retracted position, an elongated handle bar 96 is clamped to the templates 90 in parallel relation to the rod 94 to effect simultaneous pivotal movement of the templates relative to the rod 94 between their operating and retracted positions. The templates thus are releasably secured between the rod 94 and the handle 96 for selective adjustment of the spacing between the templates 90 corresponding to the desired placement of the hinges on the upstanding side edges of the panels.

The bottom face of each template 90 desirably includes spacers 98 for holding the panels 54, 56 in proper spaced apart relation for hinge attachment corresponding to the spacing provided by the fixed stop 80 and the horizontal arms of the brackets 58. A mortise 100 is formed in the bottom face of each template, and magnets 101 (only one shown in FIG. are preferably pro vided for releasably retaining a hinge within the mortise 100 with the lower portions of its hinge leaves substantially flush with the bottom face of the template. As in the first embodiment ofthe invention, a plurality of apertures are formed in the template 90 corresponding to the location of the preformed screw holes of the hinge leaves when they are positioned in the mortise 100 of the template.

For automatically holding screw fasteners in proper alignment with the preformed screw holes for rapid attachment of the hinges to the panels, spring actuated jaws 102 are disposed in interior compartments 103 (only one shown in FIG. 10) provided within the templates 90 in alignment with their apertures. The jaws .102 have recesses of semicircular configuration with downwardly converging spaced opposed surfaces which are spring biased toward one another in a normally closed position and adapted to move in opposite directions as the screw is being driven into the upstanding side edges of the panels. When the screws are set in position ,and a screw setting tool such as a power operated screw .driver, not shown, is removed from the templates 90 the .jaws 102 automatically spring back toward one another into. position for receiving another screw in a repeat operation, the jaws 102 preferably being retained in proper aligned relation. to one another by means such as starting holes for the screws in the side edges of the panels when the templates 90 are first swung into theiroper'ating position on the panels. A punch block 106 is manually positioned on each template 90, and the head 110 of the punch block is struck a hammer blow to simultaneously drive the individual punches 108 into the panels. Upon removing the punch block 106, screws are inserted into the templates and held in proper aligned position in the starting holes of the panels by the spring loaded jaws 102 soas to be driven into the panels to securely attach the hinges.

With the door panels 54, 56 thus hinged and retained in a folded position, the associated drill jig 112 illustrated in FIGS. 11 and 12 may then be applied to the lower corners of the panels. The drill jig 112 includes a pair of rectangular plates 114 and 116 secured in perpendicular relation by side braces 118 and 120. The latter are fixed on opposite sides of the jig 112 and extend between corresponding side edges of the plates 114, 116 to form a generally triangular one-piece enclosure adapted to fit over adjacent corners of the folded panels. The drill jig 112 is dimensioned to fit a particular panel thickness,

' e.g., such as the conventional door dimensions of 1% or 1 /8 inch thickness. The panels are spaced apart a predetermined distance by means of spacers 122 shown as Ibeing centrally formed on each plate so that adjacent panel faces are spaced apart with each panel being firmly retained between the spacers 122 and one of the side braces 118, 120.

To quickly and easily drill the guide and pivot sockets in the panels to adapt them for use in a bifolding door installation, a pair of apertures 124 are formed in each plate 114, 116 to locate the guide and pivot sockets on adjacent panel edges, and a wear bushing 126 is fixed in each aperture. The apertures 124 corresponding to the desired placement of the pivot sockets are formed in each plate adjacent one side of the jig 112 and the apertures for the guide sockets are formed adjacent its opposite side, the pivot apertures and the guide apertures respectively being aligned with one another and equidistant from the adjacent meeting edges of their plates 114, 116.

The above described construction allows one jig to be used for any corner position of the door panels and for both left and right hand application. This opposite hand construction on each plate 114, 116 permits the jig to be applied, for example, to the unhinged corners on the top of the panels whereby the drill jig 112 is in proper position to guide the drilling of an upper pivot socket in the jamb panel and a guide socket in the lead panel. The jig is then applied to the unhinged corner on the bottom edges of the panels so that the jamb panels .may be drilled to provide a bottom pivot socket to readily adapt the panels for receiving the guide member and the upper and lower pivot members.

Finally, the assembly jigs of the present invention are capable of rapid and precise application of door hardware, even by unskilled operators, over a long service life whereby manual manipulation of door panels 1s mim- 'mized to substantially reduce the time, cost and effort 'required to effect their installation.

As will be apparent to persons skilled in the art, various modifications and adaptations of the structure above described will become readily apparent without departure from the spirit and scope of the invention, the scope of which is defined in the appended claims.

I claim:

1. A jig usable in attaching hinges to the meeting edges of a pair of door panels comprising a frame for supporting a pair of door panels with their side edges generally horizontally disposed, a stop member attached to the frame adjacent one end thereof and engageable with said pair of door panels for positioning the panels on the frame with top panel edges and bottom panel edges, respectively, in coplanar alignment when the panels are in 'face-to-face relation, means for adjusting the stop member relative'to the frame for panels of varying height, and means for locating hinges in a preselected position on the meeting edges of the panels including an elongated rod, a plurality of hinge templates each having means for retaining a hinge, and connecting means releasably securing the templates in offset relation to the rod for adjustment longitudinally thereof in accordance with the height of the panels thereby to provide simultaneous placement of the templates on the meeting edges of the panels.

2. A jig usable in attaching hinges to the meeting edges of a pair of door panels comprising a frame, stops attached to the frame engagea'ble with top and bottom panel edges for positioning the panels on the frame for hinge attachment, means for adjusting the stops relative to the frame for panels of varying height, means for locating hinges in a preselected position on the meeting edges of the panels including an elongated rod, a plurality of hinge templates each having means for retaining a hinge, and connecting means releasably securing the templates in offset relation to the rod for adjustment longitudinally thereof in accordance with the height of the panels thereby to provide simultaneous placement of the templates on the meeting edges of the panels, and drill guide means in- 3. A jig for assembling a pair of door panels for use in a bifolding door installation wherein the top edge of one panel is provided with a guide member and the top and bottom edges of the other panel are each provided with a pivot member, the jig comprising a frame, positioning means on the frame for holding the panels with their longitudinal axes extending generally horizontally, a pair of vertical plates attached to the frame in spaced opposed relation adjacent opposite lateral sides of the frame for embracing top and bottom edges of the panels when the same are positioned in face-to-face relation, one of the plates being rigidly fixed to the frame and the other plate being releasably secured to the frame for adjustment laterally thereof to compensate for variations in the height of different sets of door panels, and the plates each having guide openings therein for drilling sockets in the top and bottom edges of the panels adjacent preselected corners thereof to receive pivot and guide members and thereby adapt the panels for use in a bifolding door installation.

4. The jig of claim 3 wherein the frame is in the form of an A frame, and the positioning means are eng-ageable with one of the panels for holding it in position on the A frame with the other panel being supported thereby upon said one panel in side-by-side relation for attachment of hinges to the meeting side edges of the panels.

5. The jig of claim 3 wherein the frame is in the form of an A frame, and wherein the plates each have a spacer engageable with the face of said one panel for retaining its position on the A frame, the spacers projecting in alignment toward one another and spacing the panels apart when said other panel is positioned in face-to-face relation to said one panel to form the sockets in the top and bottom edges of the panels.

6. In a jig having an elongated connecting rod and a plurality of templates releasably secured thereto for adjustment longitudinally of the connecting rod wherein the templates are adapted to locate hinges on the meeting edges of a pair of door panels, locating means secured to end templates positioned adjacent the ends of the connecting rod, the locating means including a pair of straps extending transversely to the connecting rod for embracing top and bottom edges of the panels, the straps each being fixed at a predetermined distance from an end template thereby to automatically position the panel edges, adjacent its respective end template, in coplanar alignment and simultaneously locate the latter on the meeting panel edges in proper position for hinge attachment.

7. A portable jig usable in attaching hinges to the meeting edges of a pair of door panels comprising an elongated rod, a plurality of templates each having magnet means for magnetically retaining a hinge, the templates each having connecting means releasably securing the templates in offset relation to the rod for adjustment longitudinally thereof in accordance with the height of the door panels for varying the hinge placement relative to the meeting edges thereof, and a pair of straps respectively secured to end templates positioned adjacent the ends of the rod, the straps being fixed at a predetermined distance laterally of its respective end template and extending transversely to the rod for embracing top and bottom edges of the door panels to automatically align the same and simultaneously locate the end templates on the meeting panel edges in proper position for hinge attachment.

8. A jib usable in attaching hinges to side edges of a pair of door panels comprising a table-like support structure, holding means attached to one side of the support structure for retaining the panels in face-to-face relation with their side edges horizontally disposed for hinge attachment, a plurality of spaced apart arms each pivotally connected at one end to the support structure and having a hinge template at its opposite end for pivotal movement between a first position extending outwardly from the one side of the support structure, wherein the template overlies the side edges of the panels, and a retracted second position, and an elongated handle bar interconnecting the hinge templates for simultaneous pivotal movement of the same between their first and second positions.

9. The jig of claim 8 including an elongated rod mounted on the top of the support structure parallel to the bandle bar and providing a common pivotal axis for the arms, the templates and the arms each being releasably secured to the handle bar and the rod, respectively, for adjusting the templates longitudinally of the one side edge of the support structure and thereby varying the hinge attachment relative to the panels.

10. The jig of claim 8 wherein the templates each have magnet means for magnetically retaining a hinge and a plurality of guide openings c-oaxially aligned with preformed screw holes of the hinge, and wherein the templates each have clamping means aligned with the guide openings for temporarily retaining fasteners positioned therein to facilitate hinge attachment to the side edges of the panels.

11. The jig of claim 10 wherein the templates each have a plurality of interior compartments formed therein around the guide openings, and wherein the clamping means include a pair of movable jaws disposed within each compartment and biased toward one another for temporary retention of a fastener positioned in the guide opening.

'12. A jig for supporting a pair of door panels in faceto-face relation with their side edges horizontally disposed for hinge attachment and comprising a table having an elongated top and a pair of upright legs attached adjacent one side of the table for supporting the same, and a bracket secured to each leg having a first member fixed to the leg and a second member engageable with the first member, the first member having a plurality of vertically spaced openings, the second member being of L-shape having vertical and horizontal arms, and the vertical arm having a projection selectively engageable with the first member through any one of its openings for adjustably securing the horizontal arm in accordance with the width of the door panels for supporting their side edges for hinge attachment at a predetermined level relative to the table top.

13. The jig of claim 12 wherein the horizontal arm of each L-shaped second member includes adjustable spacing means conforming to the thickness of the door panels for retaining the same in proper relation for hinge attachment.

14. The jig of claim 12 including first and second stops spaced apart and projecting outwardly from the one side of the table, the first stop being rigidly fixed to the table adjacent one end thereof and the second stop being releasably secured to the table adjacent its opposite end for adjustment longitudinally of the one side thereof in accordance with the height of the door panels for holding the same with their top edges and bottom edges, respectively, in coplanar alignment.

15. A jig usable in attaching hinges to side edges of a pair of door panels comprising a table-like support structure, vertically adjustable holding means attached to said table-like support structure and positioned on one side thereof for retaining the panels in face-to-face relation with their side edges horizontally disposed for hinge attachment, a plurality of spaced apart arms each pivotally connected at one end to the support structure and having a hinge template at its opposite end for pivotal movecent between a first position extending outwardly from the one side of the support structure, wherein the template overlies the side edges -of the panels, and a retracted second position, and means interconnecting the hinge templates for simultaneous pivotal movement of the same between their first and second positions.

16. The jig of claim 15 including a stop member projecting outwardly from the one side adjacent one end of the table and releasably secured to the table for adjustment longitudinally of the one side thereof in accordance with the height of the door panels for holding the same with their top and bottom edges in coplanar alignment.

References Cited UNITED STATES PATENTS 1 U FOREIGN PATENTS 95 3,884 12/ 1949 France. 1,192,826 3/1957 France.

955,725 1/ 1957 Germany.

WILLIAM W. DYER, JR., Primary Examiner.

R. J. ZLOTNIK, Assistant Examiner. 

3. A JIG FOR ASSEMBLING A PAIR OF DOOR PANELS FOR USE IN A BIFOLDING DOOR INSTALLATION WHEREIN THE TOP EDGE OF ONE PANEL IS PROVIDED WITH A GUIDE MEMBER AND THE TOP AND BOTTOM EDGES OF THE OTHER PANEL ARE EACH PROVIDED WITH A PIVOT MEMBER, THE JIG COMPRISING A FRAME, POSITIONING MEANS ONT HE FRAME FOR HOLDING THE PANELS WITH THEIR LONGITUDINAL AXES EXTENDING GENERALLY HORIZONTALLY, A PAIR OF VERTICAL PLATES ATTACHED TO THE FRAME IN SPACED OPPOSED RELATION ADJACENT OPPOSITE LATERAL SIDES OF THE FRAME FOR EMBRACING TOP AND BOTTOM EDGES OF THE PANELS WHEN THE SAME ARE POSITIONED IN FACE-TO-FACE RELATION, ONE OF THE PLATES BEING RIGIDLY FIXED TO THE FRAME AND THE OTHER PLATE BEING RELEASABLY SECURED TO THE FRAME FOR ADJUSTMENT LATERALLY THEREOF TO COMPENSATE FOR VARIATIONS IN THE HEIGHT OF DIFFERENT SETS OF DOOR PANELS, AND THE PLATES EACH HAVING GUIDE OPENINGS THEREIN FOR DRILLING SOCKETS IN THE TOP AND BOTTOM EDGES OF THE PANELS ADJACENT PRESELECTED CORNERS THEREOF TO RECEIVE PIVOT AND GUIDE MEMBERS AND THEREBY ADAPT THE PANELS FOR USE IN A BIFOLDING DOOR INSTALLATION. 